215297

Properties

Appears in sequences

• Primes p such that p-1 and p+1 are divisible by a fifth power.at n=15A089212
• Smallest prime p such that tau(p-1) + tau(p+1) is n, or 0 if no such number exists.at n=50A090482
• Primes of the form 81*k^2 - 72*k + 17.at n=5A154276
• a(n) = 6561*n^2 - 3564*n + 485.at n=6A156774
• Primes of the form p^2 + 2*p + 2 where p is prime.at n=24A157467
• Primes of the form n^2+1 such that (n+2)^2+1 is also prime.at n=8A206328
• First of two consecutive (primes of the form n^2+1) with no semiprime of the same form between them.at n=9A242109
• Prime numbersat n=19232